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SR 520 Bridge Replacement and HOV Program


A planned Aug. 26-29 construction closure of SR 520 has been postponed and will be rescheduled. For information about other SR 520 closures and construction activities, visit our SR 520 Orange Page.

Current News

The new floating bridge's bicycle / pedestrian path is now open as an out-and-back trail from Medina. Read more about the path's July 22 opening or check out our Bicycle and Pedestrian Connections webpage for more information about riding and walking the SR 520 corridor.

Pontoons from the old SR 520 floating bridge are floating away. Read about it in this blog post. More on removal of the old bridge can be found in our decommissioning folio, a July 14 presentation, and our list of environmental reports, permits, practices and correspondence. You can find more information in the Decommissioning Materials section of the Floating Bridge and Landings What's Happening Now page.

Did you miss our June 28 open house?
You can view the meeting's display boards or read this Q&A to learn about future improvements to SR 520 between I-5 and Lake Washington -- the segment we call the "Rest of the West." 

The latest bridge-noise updates, including a June 20 noise analysis report and June 13 presentation to the Medina City Council, have been posted on our Floating Bridge and Landings What's Happening Now webpage.

Program Overview

The SR 520 Bridge Replacement and HOV Program is enhancing public safety and mobility by replacing the highway's aging, vulnerable bridges and making significant transit and roadway improvements throughout the corridor. The construction program's planned improvements extend from I-5 in Seattle to I-405 in Bellevue.

Click a project title for more information



Project photos on Flickr

View the latest SR 520 project photos on Flickr.

Live construction cameras

See views from live construction cameras.

Contact Information:  



Good To Go!



Phone: 206-770-3500

More information on Program Contact Us


West Approach Bridge North ProjectI-5 to Lake WashingtonFloating Bridge and Landings ProjectEastside Transit and HOV ProjectPontoon Construction Project